<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<div id="app">
    <todo>
        <todo-title slot="todo-title" :title="title"></todo-title>
        <todo-items slot="todo-items" v-for="(item, index) in todoItems" :item="item"
                    :index="index" @remove="removeItems(index)"></todo-items>
    </todo>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>

    // slot: 插槽
    Vue.component("todo",{
        template: '<div>\
            <slot name="todo-title"></slot>\
                <ul>\
                    <slot name="todo-items"></slot>\
                </ul>\
            </div>'
    });

    Vue.component("todo-title", {
        props: ['title'],
        template: '<div>{{title}}</div>'
    });

    Vue.component("todo-items", {
        props: ['item', 'index'],
        // 只能绑定当前组件的方法
        template: '<li>{{index}} ---- {{item}} <button @click="remove">delete</button></li>',
        methods: {
            remove: function (index) {
                // this.$emit 自定义事件分发
                this.$emit('remove', index);
            }
        }
    });

    var vm = new Vue({
        el: "#app",
        data: {
            title: '列表书籍',
            todoItems: ['Java', 'Linux', 'Python', 'Golang']
        },
        methods: {
            removeItems: function (index) {
                console.log("删除了" + index + "OK");
                this.todoItems.splice(index, 1); // 一次删除一个元素
            }
        }
    });
</script>

</body>
</html>